![]() ![]() ![]() Additionally, we can remember not just the objects that we’ve seen, but also the specific configurations and contexts we saw them in ( Brady et al., 2008), suggesting that our brains store these memories with considerable visual detail. For example, after viewing thousands of images, each only once and only for a few seconds, we can determine with high accuracy the specific images that we have viewed ( Brady et al., 2008 Standing, 1973). Under the right conditions, this type of ‘visual recognition memory’ can be quite remarkable. The everyday act of viewing the things around us leaves us with memories of the things that we have encountered. Understanding visual recognition memory could help us understand the mechanisms of memory more broadly. Visual recognition memory may be a good place to start because of our existing knowledge of how the brain processes visual information. Identifying the mechanisms underlying memory may lead to new treatments for memory-related disorders. Repetition suppression in certain inferotemporal cortex neurons can thus account for visual recognition memory.īrain disorders and aging can both give rise to memory deficits. However, a decrease in the number of firing events for a particular subset of the neurons did predict the remembering and forgetting. The results showed that the total number of firing events in this region was not a great predictor of how long the monkeys remembered images. Then, the rate at which the monkeys forgot the images was compared with the rate at which repetition suppression disappeared in inferotemporal cortex. The monkeys were very good at remembering the images they had seen more recently, although they tended to forget some of the images with time. Meyer and Rust have now tested this idea by training macaque monkeys to report whether images on a screen were new or familiar. This decrease in firing, known as repetition suppression, may be the signal in the brain responsible for the sense of remembering. These neurons also reflect memories of whether those things have been seen before, by firing more when things are new and less when they are viewed again. Neurons in a region of visual cortex called inferotemporal cortex fire in a particular pattern to reflect what is being seen. Visual information travels from the eyes to an area of the brain called visual cortex. Several days later, you will still be able to distinguish most of those images from previously unseen ones. Imagine viewing thousands of images for only a few seconds each, for example. This type of memory, known as visual recognition memory, can be remarkably powerful. As we go about our daily lives, we store visual memories of the objects and scenes that we encounter. ![]()
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